Colored Bricks Starter Kit - 96 Pieces, 2x4 Stud, 12 Colors - Building Blocks, Creative Toy & Building Set for Ages 3+ - Compatible with All Major

Walmart - Cobers

Block type (small interlocking bricks) matches, Colors (red, blue, yellow) are consistent with those visible in the frame, Generic design is consistent with the indistinct blocks in the frame

Childcraft Preschool-Size Building Bricks

School Specialty

Block type (small interlocking bricks) matches, Colors (red, yellow, blue) are consistent with those visible in the frame, Generic design is consistent with the indistinct blocks in the frame

S&S Worldwide Color Splash Classic Building Brick Set of 1100

S&S Worldwide

General category of small, colorful building bricks matches