Build quality: The horse and rocker plate are blown plastic and fairly light weight, yet very sturdy. There are no defects (thin spots,mold lines etc.) There are no sharp ridges either. The horse and rocker are both good quality, and durable. Assembly The horse comes preassembled with wheels. The only assembly required is attaching the \"eye\" stickers to the horse head and screwing in the handlebars (two pieces into themselves) Attaching rocker The rocker attaches using a single nut shown in pictures 3,4. Use: This is perfect for a 1-2 year old. The hight is perfect and it's the smallest rideable toy weve found. It is very stable and safe. While the wheels work well, the horse doesn't move too fast which allows a toddler to get on easily-- there is a healthy amount of friction. Out toddler sits perfectly on this and loves it. Final thoughts: This is a great first rideable toy /rocker that we highly recommend!