"Symbol Search — children are given rows of symbols and target symbols, and asked to mark whether or not the target symbols appear in each row."
I think symbol search is maybe more like a super long kindergarten level matching worksheet than like a where's waldo. I think no one finishes it, that way they spread apart the levels of speed.
It actually looks a lot like a Where's Waldo page - the symbols are in rows but there are a lot of them all over the page, so even though it's not a all-in-one picture like Where's Waldo it also doesn't look like a super long kindergarten level matching worksheet either.
polarbear