Hammer and nail games, exercise the baby's hand-eye coordination, promote brain development, and recognize colors. Using a wooden stick, the nails can be taken out to exercise the baby's fine motor ability. Select wood to build strong and durable. Enhance color awareness develop color perception. This toy can exercise children's color cognition and hand-eye coordination. This product can accompany your children throughout their childhood and enables them to enjoy the age of toys. The toy is made of wooden and the material is environmentally friendly, non-toxic and pure natural. This toy has rounded corners, smoothly polished, will not harm children, and is very safe to use. The elegant and unique design makes it a special gift for your lover, friends or women of all ages, also suitable for any occasion, such as anniversary, party, etc. 1x Cognitive Toy Material:Wooden Size1:Approx.18x13x15.5cm/7.08x5.11x6.1inches Size2:Approx.4cm/1.57inches Size3:Approx.17cm/6.69inches Size4:Approx.10cm/3.93inches 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.