HELP! Kitten agression!

[Kalou]

Any help/suggestions would be greatly appreciated.

1. Issue 1 - Aggression towards our 6 year old cat
We have a kitten who is about 6 months old. He is constantly chasing out 6 yr old cat Kalou, and jumps on his back where Kalou can't get away from him. We put Oakley (the kitten) in a time out but as soon as we let him out, he goes after Kalou again. We are constantly playing with him and trying to redirect him but need new suggestions. Getting another kitten isn't an option though. Kalou usually just runs, which makes it a game, and Oakley chases him.

2. Issue 2
Oakley is constantly getting into everything. Right now he climbs into the Christmas tree, chews wires, etc. We never have had this problem with our other cats so are looking for new suggestions.

what we have tried:
- squirt bottle with water
- time outs

Please any suggestions would be appreciated. We love Oakley and just want him to be safe in the house with our other cat.

Thank you!