One size does not fit all kids for shin protection. The right size shin-guard is critical to comfort and protection for your mini. Most kids shin-guards have padding in an attached ankle guard for extra protection. When first starting out, look for a single strap system with a front closure to keep ankle and shin-guards in place to eliminate constant adjusting on the field.
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs