Alphabet help:
50 Alphabet Activities for Preschoolers
https://handsonaswegrow.com/50-alphabet-activities/ 

At Home, Hands-on And Interactive Alphabet Activities
https://www.pre-kpages.com/alphabet/ 

Writing help:
10-Pre Writing Activities for Preschoolers
https://teachingmama.org/prewriting-activities-for-preschoolers/

15 Fun Writing Activities For Kids
https://www.notimeforflashcards.com/2013/04/15-fun-writing-activities-for-kids.html

Rainy Day Ideas:
45 Quick And Easy Crafts That ANYONE Can Make
https://www.happinessishomemade.net/45-quick-easy-kids-crafts-anyone-can-make/

Easy Science Experiments That Use Household Items
https://sciencebob.com/category/experiments/