Our 5 year old has had so many rock collections (and shell collections, leaf collections, feather collections, wood collections) that we decided to get a few glass jars for his very favorite, most special pieces...
And as an always-learning-at-home family, we've come to love some of these activities and ideas for getting down and dirty in nature with the kids:
I Love Dirt!
Nature in a Nutshell
15 Minutes Outside: 365 Ways to Get Out of the House and Connect With Your Kids
Roots, Shoots, Buckets and Boots
Fun with Nature: Take Along Guides
Sharing Nature With Children
Why Dirt is Good: 5 Ways to Make Germs Your Friend
The Green Hour: A Daily Dose of Nature for Happier, Healthier, Smarter Kids
Further reading on nature and the powerful, positive effect of being outside immersed in the natural world around us.