"With intricate details and a unique owl design, this 161-piece wooden clock is a challenge to assemble, and a joy to watch the gears spin as it keeps time! Featuring high-grade laser-cut plywood, it requires no glue or tools to assemble and includes easy, step-by-step instructions. Req. 1 ""AAA"" battery (sold separately). Assembly time is approximately 3 1/2 hours. Assembled size is 8""L x 5""W x 10 1/2""H. Ages 14 yrs to adult. Excellent craft project for both children and collectors. Easy to follow, step-by-step illustrated instructions. All wooden pieces are precisely cut so they fit perfectly together. Kit comes completely disassembled. Assembly time 3.5+ hours. Assembled size is 8.11 x 5.04 x 10.43 inches. Recommended Ages 14+."