He'll come back to you PP! Because I'm carrying DS2 all the time, DS1 is very very happy to go in the sling too!
We've got teething poo as well. Although not so bad as obviously still fully breastfed. Plenty of nipple biting too though 
Just got the Jumperoo from the loft and DS2 LOVED it. I think it wiped him out, he's asleep now. I curious to see what DS1 will make of it when he comes back from nursery this afternoon. I wonder if he'll remember it. I'm CERTAIN he'll want to have a go!!