These Rhythm Club bongos are awesome. You just have to put them on the floor and the kids will do the rest. Molded feet provide for durability and sound projection. Pre-tuned synthetic heads and durable shells guarantee years of carefree play. The larger drum produces the bass beats while the smaller one produces the tenor beats. Each shell embellishes a colorful kaleidoscope of faces representing children from all corners of the globe. Ask your child to find the similarities and differences or even identify the different nationalities represented; a wonderful opportunity to learn about and develop an appreciation of world cultures. The set is 5 inches high. The diameter of the bass head is 6 inches and the diameter of the tenor head is 5 inches, just the right size for a small hand. Suitable for ages 3 and up.