NEUTERED KITTEN HELP!!!

My boyfriend and I just took my 5 month old kitten to the vet to be neutered. When he came home I expected that he would be drowsy or out of it, but he's the exact opposite! He's already the most playful kitten I've ever owned, but this is almost like possession. He tears around the room, jumps onto and off of things, and rolls all over the floor trying to get his cone off. The vet told us to keep him from doing these things but how are we supposed to stop him?! I've confined him to one room only, where he has food, water, and a litter box, and I even put stuff on all the high places in the room so he wouldn't jump up. Yet despite seeing the large objects that are in his way, he STILL jumps up, smacking right into the object and then falling to the floor. HE KEEPS DOING THIS. I'm afraid he's going to tear his stitches. I'm not home all the time so I can't constantly monitor his actions to make sure something doesn't go wrong. What do I do?! How do I calm him down? HELP.

He is a male?  So he perhaps doesnt even has stiches, it depends on the technique adopted.

Many has just a little incision, which is drying off in one day or two.

Its quite common male dont need any collar, and are allowed to lick, as long they dont overdo it.

Here it is a little difficult to know what should be done.  The vet did prescribed the collar, yes. Question is, did the vet used a technique where collar IS necessary, or did he made a modern surgery, but wanted the collar on because he was used to it from  the old custom. Or even, just to be on the safe side, so nobody can accuse him of malpractice, if he doesnt prescribe collar, and there happens an infection....

Here, as he is so lively, it may even be safer to try take if off, but you keep watch.   He will lick, but some licking is allowed, as many forumists witness (mine residents were also allowed to lick some).

If you notice he overdoes it, or the wound doesnt look good - put on the collar again...

If he behaves when you are in with him, he will hopefully behave also when alone.

Before you do it, look on the wound as it looks NOW, so you can notice any changes.   Measure also his body temp, you can do it in the armpit if you wish.   So you will notice any changes, if need be.

Good luck!

When males are being fixed, the surgery itself is a short procedure and the cat is not under as long as a female.  This being said the males recover alot faster and are back to normal sooner.  As for the cone, the kitten is not used to this and that might be making him freak out. He will most likely be calmer without it.  I have had cats most of my life, male and females and they have never had collars.  Also the surgeries were done in different locations, so this practice of no cones was seen as acceptable by many vets.  I agree with StefanZ, see how the kitten does without the collar and go from there.  I have never had an issue of infection in any of my cats post surgery.