I thought about selling these boxes individually, but once I dumped them out and started to play with them, I realized how much better it is to have them all together. The labels on these Milton Bradley Froebel "Gift" boxes are pretty aged, but I believe here are Gift 3 (the divided cube, a 2 inch cube comprised of 8 one inch cube blocks), Gift 4 (rectangular prisms, with a proportion of 1 to 2 to 4; 1/2” by 1” by 2”), and then what I think is a partial Gift 5 set placed in a Gift 4 box, including 16 triangular prisms. I'll never get over my appreciation for these, so simple but so special feeling, and think these three sets together could occupy child and adult a like for quite a long time.

Each box measures 2 3/4" cubed. Boxes and blocks, c. 1900, show some wear and age, but remain in good condition, and other than the worn labels the boxes show no damage. 

More about Froebel Blocks:

When Friedrich Froebel established the first system for educating young children, he created a series of playthings to provide children with focussed educational experiences. Up until that time, toys were intended for amusement and education was provided through books and instruction. Froebel's Kindergarten used play as its engine and his Spielgaben ("play gifts") were the fuel. During his lifetime he codified the series of Froebel Gifts up through Gift 6. After his death in 1852, his followers extended the series of educational toys by numbering other materials used in his school.