T-shirt Painting by a Toddler by idil in DIY, Kids 14. August 201515. August 2015 42 9477 My son likes painting, also he likes white t-shirts! Not only is “T-shirt Painting by a Toddler” the best activity for him, but it is also so simple! For this activity you will need just a plain white T-shirt and fabric colorpens. Then let the kid paint! Do NOT forget to put a cardboard in-between the t-shirt!! Otherwise the paints come through the back of the shirt!! And finished! He is so proud of what he did!