Board games with 2 dice
"Look 2 plus 1 more means you get to move 3 spaces."

Leave one dice on 1 and roll the other one it will not take long before the wires connect and they realize the pattern of 1 more.

then do the 2's and so on.. can also be done on a number line.

Also use every day situations to talk about math. "You have 10 snacks and I give you 2 more how many will you have? What if I eat 2 of your snacks?"