Congratulations! They are so cute!
TP tips- Our kitty liked to unroll the toilet paper when she was younger and what we did was turn the paper around so it pulled from underneath. Once she realized she couldn't do it anymore she left it alone and we soon could turn it back so it rolled over the top like we liked it.
Another alternative is to take if off the roll entirely and set it on the counter or whatever till the puppy is old enough to leave it alone.