Benjamin, a six-year-old, loves putting together puzzles. he has recently mastered putting together a 10-piece sesame street puzzle. his mother claps at his accomplishment but wants to continue challenging benjamin just beyond his current abilities. the next time they play, she gives benjamin a 15-piece puzzle and offers some guidance on how to sort the pieces out. according to vygotsky, benjamin's mother provides that allows benjamin's cognitive abilities to be built higher and higher.