When I was a youth I had a set of Sportcraft Hi-Roller lawn dice. There was a pair of white and yellow dice, and they were the friendly-foam type, which meant they rolled quietly, and if you wanted to play a game of Spud with a randomized call-out, you have that.
The Lawn Dice set I had as a kid were plastic, not foam. I think we had the Chinese 2, but not sure.
FAUX EDIT:
Found a set on eBay. Does indeed have the Chinese 2 (and note how conspiculously none of the dice on the box have their '2' face showing....)
Sadly, there's none on the 'bay for sale right now, and they're 3.5", not 3.25", but I think you'd find that to be close enough.