We did the homemade bbq marinade last year. It worked well and tasted good. I've also done the painted mugs (never thought to do the tape thing mimi, will try to remember that for next time!!) but I used cheap dollarama permanent markers and it faded when I baked them. I've also done the "I love you to pieces" and filled the jar with reese's pieces and had them decorate the jars with stickers. We've also done the bird houses from dollarama that they painted.
I think this year I am going to make cards that look like hammers and get the kids to decorate them. I am going to look at walmart cuz I thought I saw kids baseball gloves with a ball for $5. I thought I would get them to put their handprint (ya I know, another handprint lol) on the ball and attach a cute note saying "You're the best "catch" for a daddy" and have them decorate the note.
Some of these have been pinterest ideas and some have been my own and some are a mix of both! lol