This kid isn't quite with it, Chuck.
2 seconds sound clip from the It's the Easter Beagle, Charlie Brown movie soundboard.
You can hear this line at 00:05:06.233 in the Blu-ray version of the movie.
Quote context
[...]
- On Easter Sunday, the Easter Beagle passes colored eggs to all the good little kids.
- The Easter Beagle? Are you sure, Linus?
- Come on, Sally. I thought you wanted to get some new shoes.
- Hey! It's Chuck and his team. Hi, Chuck. What are you up to?
- We're here to get some eggs to color for Easter. Marcie here fried the last batch.
- This kid isn't quite with it, Chuck.
- I think it's a waste of time to buy and color eggs 'cause the Easter Beagle will do all that.
- Hey, Chuck, what's all this about an Easter Beagle?
- Has your friend here got all his marbles?
- Well..
- He did say Beagle, didn't he?
[...]