zeyuanfu :
I would suggest the Pentium G3258 for future builds as it's stronger than AMD CPUs in its range and has the awesome upgrade path to the 4690K and Broadwell CPUs.
While I see your point and agree with it to a great extent, for a 11 - 14 year old, an APU based solution might work well for a first build, which would be handed down or cannibalized later. The APU can play Minecraft moderately well without the expense of a GPU.