Funny how the boys' fighting inspires some creative intervention on Mom's part.
The boys were fighting over some ridiculous toy which Kiddo wanted to use as something over which he could jump. So instead I put a rectangle of tape on the floor for him to jump over. Now I call it the Amazing Rectangle. (This post contains affiliate links)
Things you can do with a rectangle of tape on the floor:
Jump over it.
Jump in it.
Jump around it. (Hi, downstairs neighbors!)
See how many times you can bounce a ball in it.
Race cars around it.
Race cars through it.
Use it as a start or finish line.

Ball bouncing was definitely the favorite challenge. Use ping pong balls because they are light weight, have great bounce potential and are unlikely to break anything when the inevitable happens.
MORE: Sibling activities to stop the fighting
What do you think your kids would do with a rectangle of tape on the floor?
P.S. I highly recommend using low-tack painter's tape (test before use, but I've never has a problem.)
For more EASY ideas, check out our giant list of indoor activities for kids, or these tried and true ideas which siblings can do together:
MaryAnne says
Brilliant! We did something similar last year:
http://mamasmiles.com/?p=942
Tricia at Mom is the Only Girl says
Oh how I wish I could think that quickly! I love this idea! I might use it soon! Thanks!
amandab says
What and amazing rectangle that is! Maybe one of those jumping games like you do with elastics? If only I could remember the words ...
Raising a Happy Child says
I have to try it out!
•´.¸¸.•¨¯`♥.Trish.♥´¯¨•.¸¸.´• says
What a great idea.
It is something like thinking inside and outside the square, you could take this game anywhere with you ;).
aly in va says
after my kids behavior today- they'd fight in it!
Sarah Slaven says
That's funny I hope your neighbours forgave you.
Christie - Childhood 101 says
A 'sit down and put your shoes on' rectangle might work in our house?