Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
My son is obsessed with knives, but at 3 he's a long way off from having one of his own.  We were camping this summer and it got to the point where we were desperate for him to have something of his own.  I am so happy that we found this knife.  I was worried that he would brush it off as being too much a toy (like when kids won't play with toy phones, but only want the real thing).  Luckily, he's also obsessed with being bigger.  He saw this big knife and proudly told his dad, "my knife is bigger than yours!"  He is one happy boy and kept this clipped to his pants for the remainder of the trip.  He is rough on things, but hasn't managed to break any of it.  We are so happy that there is a kid-safe version of a Swiss army knife that passed the test.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive