Designed by parents and teachers, this award-winning kit is based on the learning principle of "sight words"--the first words that kids should learn to recognize without having to sound them out. * Kit includes 140 magnetic word tiles. For ages 4 and up. Individual word tiles are .75" tall. Package size is 4.75w x 6h x 1.25"d. * WARNING: Choking Hazard - small parts. Not for children under 3 yrs.