In a bowl, mix the lotion and cornstarch together until combined with a rubber spatula. It will be sticky at first then pick it up with your hand and knead it together.
Roll it into a big ball then separate it into 3-4 small balls (depending on how many colors you want). Squish them flat then press your thumb in the middle. Put them on parchment paper to protect your table.
Drop 1-2 drops of food coloring into the thumbprint part. Put on gloves and mold the dough until there is no white showing. Take off gloves and it's time to play!
Notes
Store in a ziploc or tupperware container to keep fresh.