Includes 100 of the 1-unit cubes (yellow); 20 of the 10-unit rods (green); and 5 of the 100-unit flats (blue). 125 block pieces total. Foam is lightweight, soft, quiet, and washable. Comes in a resealable storage bag. Teaching tips are included. Not for children under 3 yrs.

Teacher Created Resources is an educational publishing company founded by Mary Dupuy Smith, a classroom teacher. All of their products are "created by teachers for teachers and parents."