The invitations were super cute but I'm not posting them because I don't want to share my address. I made long, tall purple rectangles, punched out a square "window," inserted a braid made from embroidery floss and tied with a purple ribbon (anchored with a dab of hot glue) and backed it with plain white card stock. There's a good example on Martha Stewart's website (I don't recommend Martha's punch because it is overpriced and, if you watch the video, even Martha can't get it to work.) I was able to get three invitations printed per letter-sized page. I purchased bright yellow envelopes from Office Max.
I drew Flynn's "Wanted" poster -- if you want to make one, I don't exactly have any tips as I did it freehand. However, the other things are very do-able. The lantern pinata was made by my husband with two balloons, paper mache and colored tissue paper. We filled it with plastic lizards of different colors (like Pascal, the chameleon), rubber ducks for the Snuggly Ducking and "Tangled candy" printed with the images of the movie characters).
We taped paper to the fence for the kids to paint like Rapunzel and provided palates cut from cereal boxes and topped with washable paints. In the front yard, we used two yellow, plastic tablecloths tied together, wrapped around the trunk and hanging down like Rapunzel's hair.
I cut out Pascal heads and glued googly eyes to them and glued them to party blowers -- those were a big hit.
I found super cute party favors at Party City -- tiny watercolor paint sets with a loop at the top. We used yellow ribbon to make them into necklaces -- all the kids loved them. They came 12 to a pack and you could choose regular or ones with Rapunzel printed on to case. All the kids were walking around with them on. Really cute.
Other than the sudden cold front that moved everyone inside after the pinata broke, it all went off without a hitch. I'm so tired. But I'm really happy. After dinner tonight, my daughter turned to me, unprompted, and said, "Thank you so much for the nice birthday party!" So that's awesome. I'm so lucky to be a mom.