Purchased two of the Stego dinoglows and could not be more thrilled about them! They are a smidge smaller than I expected, but honestly a great size because it doesn't take up too much space, and can rest on the bedside table (nice if you have a table lamp and you can sleep looking at the glowing dino!). I love that one side is so fun and imaginative, while the other side is just really darn cool and feels more scientific-y. I bought two to give to each of my nephews, but a very small side of me wants to keep one for me :D