The Parents Electronic Activity Cube is the best one I've seen by far. It has different things to play with on all sides, as well as the top. One side has a telephone with number buttons. One side has a color wheel that turns and a small piano keyboard. The other two sides have shapes and number sorters. It also comes with four letters, A, B, C, and D and four numbers 1, 2, 3 and 4. There is a clock on the bottom that locks in place, and then opens up to release the letters and numbers once its place at twelve o'clock. The top has a busy beads feature that has swirls and loops with beads on it to move around and push from side to side. The different sides make different sounds and the top lights up when you move the beads around. This has provided lots of entertainment for my daughter over the last year since she got it. It is also the most reasonably priced activity cube like this, it is under twenty five dollars.
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