Make a sparkly t-shirt that sparkles with real lights.  The lights are triggered by the Circuit Playground's shake sensor, so they twinkle when you move, dance, jump, or wiggle.

This is a very easy beginner project that's great to do with kids.  It uses a vinyl cutter for the customizable iron-on decoration, and a Circuit Playground programmed with MakeCode, Microsoft's drag-and-drop code editor.  The electronics slip into the t-shirt pocket -- there is no soldering or sewing required.

Best of all, the Circuit Playground is removable, so you can easily use it for other projects too.


1 x Circuit Playground Express
Adafruit Circuit Playground Express
1 x USB cable
USB A to Micro-B - 3 foot long
1 x Battery
500mAh LiPoly Battery
1 x Battery Charger
USB Battery Charger

Materials Needed

  • T-shirt with a breast pocket
  • Circuit Playground Express
  • LiPoly battery
  • Vinyl Cutting machine
  • Sparkly iron-on vinyl
  • Iron & ironing board
  • Sticky-back velcro square
  • Rubber Band

This guide was first published on Oct 18, 2018. It was last updated on Oct 18, 2018.

This page (Overview) was last updated on May 21, 2020.