From the author's README on Thunderstore

A Backyardigans daypack for skate. Wear it over any outfit.

The bag sits on the upper back, moves as one solid piece, and the straps bend with the shoulders.

Backpacks

Backyardigans — Own_Backyardigans_Backpack

Where to find it

Open your wardrobe and look in Outfits. The backpack is worn in the outfit slot but does not hide your top or bottoms.

Install

Install with a mod manager, or copy this folder into your ReSkate Mods folder, then turn it on in the ReSkate launcher.

Notes

Fan-made. Not affiliated with or endorsed by Nickelodeon; names and characters belong to their owners.
Ported from a GTA V / FiveM backpack model.

Install Backyardigans Backpack

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Backyardigans Backpack and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.