255 Piece Wooden Domino Rally Race STEM Based Learning Set in Bright Colors and Fun Patterns 255 piece wooden domino race set perfect for single or multiple kids to play Arrange the dominoes in various patterns and start a chain reaction to make them all fall down STEM based learning toy helps develop children's concentration, strategic skills, and fine motor skills Kids can create their own domino rally set-ups, encouraging hours of creative and imaginative play Purchase this STEM toy and Bayer will donate a STEM toy to Toys for Tots