We also have a highly VS son, around your son's age (he also hit the ceiling on the VS and MR tasks on WPPSI IV as a young 4 year old - he thought the block design was "very easy")...Our experience with puzzles (did 100 piece puzzles around his 2nd b-day, when puzzles were an obsession of his), Legos and block construction has also been interesting (as a young 5 year old, he constructed a 16+ Lego Creator Expert set in a couple of days all by himself). We haven't felt the need to retest, as we are quite sure he is in the very extreme tail in VS skills...but I would also be interested in how to provide activities for a young VS kid like that (other than Lego:) ) In elementary school, I think extremely verbally gifted kids will stand out more than extremely VS kids (although at least in our case, DS is several years ahead in math with very minimal instruction)? I think if your son is happy for now in school, that's wonderful!