"Little miracle" toy

"Little miracle" is a toy to grab, spinning, observe and move. If you turn it like a top on its closed surfaces, it seems to turn faster, sometimes slower. Its circular openings gates up and down. Sometimes it rolls up and down, suddenly it appears to come to a standstill, brakes and accelerates again. The view into the colored opening, which does not run through the center of the ball, changes constantly when turning and rolling. Flattering for hand and eye, you don't want to let go of it. 3+