Help with Spongebob themed party?

I am planning my daughters 3rd birthday and it's spongebob themed. I was looking for Ideas for party favors or treats to hand out, maybe even cool goodie bags. Last year was Dora and I had made marshmallows on a stick with the Dora colors and they were the centerpieces. I want her party to be a little different than other spongebob parties but if you have ANY ideas they could help me out a ton. I also needed help with the invites, I am good at crafty things so I will take those types of ideas too. If you have any other ideas like for goodies, games, treats, pi�ata, cake, or anything you tried in the past will really help me make her party very memorable. Thank you so much for your help. If any other details are needed feel free to leave a message and I will post them.