T-shirt with tiny LED lights that run on a tiny battery. The light can be switched on or off using a simple button.Each battery works for 200+ hours of constant running & is a tiny coin/button cell. Battery is replaceable & 2 batteries are included with the T-shirt.100% interactive 100% fun 100% trendy & 100% safe even for new borns.Wash Proof Iron Proof Kid Proof.Wash & care instructions�Machine washable.Do not bleach.Colors do not bleed.Suitable for kids between 3 to 9 years. Sizes Available�20 - 2 years22 - 2 to 3 years24 - 3 to 4 years26 - 5 to 6 years28 - 7 to 8 years30 - 8 to 9 years