In order to celebrate the birthday of Dr. Seuss, I organize a "Read Across America Day" in my classroom. This handout explains the origins of the day and also shares some activities we do.
For example, I have my students participate in a "book swap" in which they can bring in gently used books that they've already read or don't plan on reading. When students bring these books in, they receive a voucher for one free book. (I usually add book from my classroom/personal library too!) This is a way of getting kids excited about reading new books that don't cost them a penny :)
Another activity I do with the kids is encouraging them to limit their use of t.v./internet for the week. If students pledge to only use 3 hours or less of screen time, their names get put in a drawing for prizes. (These prizes are provided by local businesses that LOVE to donate once they hear what the kids are doing!)
Lastly, I ask the students to do their part by promoting literacy somehow... Maybe it's as simple as reading a book to a sibling or creating a movie about the importance of reading.
This week is always a big hit that wraps up with a HUGE Happy Birthday cake shared with the entire school at lunch.