YSTD&reg; New Alloy Magic Yo-Yo Ball For Kid Children Gifts Playing Training Funny Toys Green Size:5x5x4cm/1.97"x1.97x1.57" It is not only for daily entertainment, but also for acrobatic performance with most entertaining fancy It can cultivate the imagination, creativity and rapid reaction ability Designed to train fine motor skills and eye-hand coordination. A perfect toy for kids, friends, families, etc