Waterpark Simulator Tools: Duck Gun, Royal Hammer and More

Close-up of the Duck Gun on its display in Caymart under a sign reading Duck Gun $20000 — Image: Gameplay frame, Caylus on YouTube

The Duck Gun costs $20,000 and the Royal Hammer $100,000, both bought with cash from the old man at Caymart with no research needed for the gun. The Royal Hammer is cosmetic. The golden hammer, a free secret, fixes anything in one hit. The plunger gun and paint gun came with 1.0, and the trumpet, megaphone and walkie-talkies only work in multiplayer.

What Caymart sells, and for how much

Caymart is the shop in the street outside your park, run by an old man. Two tools sit on display there under price signs, and a locked one shows the cash you need to buy it.

The Duck Gun on display in Caymart under a sign reading Duck Gun $20000 — Duck Gun, $20,000. No research unlock required.Image: Gameplay frame, Caylus on YouTube

An ornate locked display case in Caymart under a sign reading Royal Hammer $100000, with the prompt Need $100000 to buy — Royal Hammer, $100,000. The prompt reads Need $100000 to buy until you can afford it.Image: Gameplay frame, Caylus on YouTube

Tool	Price	How you get it	What it is for
Duck Gun	$20,000	Buy at Caymart	Firing rubber ducks; its recoil is also a rocket jump
Royal Hammer	$100,000	Buy at Caymart	Looks. It works like a normal hammer
Golden hammer	Free	Secret spawn outside the park	Fixes anything in one hit
Plunger gun	—	Added in 1.0	Pulling yourself to hard-to-reach spots
Paint gun	—	Added in 1.0	Painting at range, guests included

Prices as shown on the in-store signs.

The Duck Gun

“No research needed. Just some cash for the old man at Caymart. Show the world how much you love rubber ducks.”

Waterpark Simulator 1.0 patch notes[developer]· 31 July 2026

On paper it is a toy that sprays rubber ducks. In practice it is how players reach the rainbow chest: look straight down, hold fire and spam jump, and the recoil lifts you over Caymart and the invisible wall. That route turns the $20,000 gun into a $5,000 payout once, so buy it because you want it, not for the chest.

Three duck things get mixed up. The Duck Gun is the handheld from Caymart. The water cannon is a duck-shaped structure you build and sit in, which the patch notes describe as letting you "power wash any guest or player in range". And the plain water gun, the one the task list keeps asking for, is a different tool again, used to put out burning guests and clean smelly ones.

Royal Hammer or golden hammer

The developers were upfront about the Royal Hammer at launch: "No extra function beyond a regular hammer, but have you seen the bling on this thing?" It is a $100,000 status symbol. One YouTuber who bought it was still saying he did not know what it does 49 minutes into the episode.

The golden hammer is the opposite deal. It is free, it lies on a pile of rubber ducks in the city outside a new park, and two August patches turned it from a curiosity into the best repair tool in the game: first stronger than the regular hammer, then able to fix anything in one hit. The catches are that you carry only one, it does not survive quitting, and a fully expanded city park can no longer reach it. The route is on the secrets page.

Royal Hammer
Caymart purchase
$100,000
Same repairs as the starter hammer. Buy it for the look, late, when money has stopped mattering.
Golden hammer
Secret pick-up
Free
One-hit repairs since 14 August. Also found on the beach map since 21 August. Resets every session.

The other tools 1.0 added

Plunger gun
Movement
Described at launch as making you "feel like a superhero with a grappling gun" for reaching high spots fast. Spamming it could make your hands disappear and break the game until a restart. Update 1.0.91 lists that as fixed, but players in the bug thread said it happened again on the new build.
Paint gun
Decoration
Paints at range. Since 2 August it paints guests in any mode, which is what the paint-a-guest objective needs. Miss and you tile the floor instead: open the floor tool with right-click and plain sand is the third pattern at the bottom.
Water gun
Guests
Cools down guests on fire, cleans smelly ones, and covers the spread-love objective. You can hold the trigger to keep firing, a change the patch notes sold as no more 40 clicks to clean a guest.
Sledgehammer
Building
Not new, but the tool people ask about most. It is how you delete anything you built until the Demolish button is researched, and breaking a building returns part of the price, which is as close to selling as the game gets. The full routine, and moving pools instead, is on the delete and sell page.
Taser
Guests
A research unlock, and the answer to Channel Energy Through Guests and the nasty-guests task. It works on the Mafia man outside the park too.

Multiplayer-only gadgets

Three tools exist for co-op. The walkie-talkies and the megaphone sit on the desk by the ticket computer.

A walkie-talkie highlighted with the prompt Take Walkie Talkie on the ticket booth desk, next to a megaphone and a desk phone — Walkie-talkies and the megaphone on the ticket booth desk. The prompt reads Take Walkie Talkie.Image: Gameplay frame, Caylus on YouTube

Walkie-talkies: anyone holding one hears you from anywhere on the map, which beats proximity voice in a big park.
Megaphone: for when friends cannot hear you across the park, you shout louder.
Trumpet: plays music. The patch notes suggest doing it right next to a friend's ear.
Throwing items at other players counts as PvP, so a host can switch it off in the lobby settings. See the multiplayer page for the rest of the host options.