The set contains 60 pieces dinosaur eggs toys, enough to meet your various usage needs, sharing them with family and friends, and spending an unforgettable time together. The surface of the eggshell is painted, and the product may have a residual odor; You only need to expose them for a period of time to disperse. The paint is safe, reliable and harmless to the human body, and can be applied with confidence. These dinosaur eggs hatch and grow in water. Place them in water below 30 degree centigrade, keep the whole egg submerged in water and avoid sun exposure, then start to hatch in the water about 12-24 hours. After the dinosaur came out of its shell, it continue to grow up; Keep it submerged in water and it will become more and more complete, but it may become smaller out of water.