Series
| Series Name | Release Date | Product Count |
|---|---|---|
| Community Helpers | 2013-08-01 | 31 |
| Community Helpers + Meet the Community Helpers Pairing | 2021-08-01 | 4 |
| Community Places | 2022-01-01 | 15 |
| Comparing Directions | 2019-01-01 | 6 |
| Concepts | 2015-01-01 | 8 |
| Construction Zone | 2022-08-01 | 7 |
| Construyendo el carácter (Building Character) | 2018-01-01 | 7 |
| Cook with Me | 2014-08-01 | 9 |
| Cool Careers | 2019-08-01 | 7 |
| Cool Cars | 2022-08-01 | 23 |
| Cool Castles and Palaces | 2019-07-30 | 8 |
| Cool Cats | 2017-08-01 | 27 |
| Cool Rides | 2009-08-01 | 22 |
| Countries of the World | 2022-08-01 | 37 |
| Countries We Come From | 2015-07-01 | 75 |
| Country Explorers (set 2) | 2023-01-01 | 11 |
| Country Profiles | 2018-08-01 | 79 |
| Crafting with Nature | 2020-01-01 | 7 |
| Craft It! | 2017-08-01 | 5 |
| Crafts in a Snap! | 2023-01-01 | 7 |
| Creepy Crafts & More | 2020-08-01 | 7 |
| Creepy Crawlies | 2016-01-01 | 13 |
| Cutting Edge Technology | 2020-08-01 | 7 |
| Danger Below! | 2020-08-01 | 7 |