Sharing when there are lots of something might be easier at first
Researchers describe sharing as being either costly or non-costly.
Costly sharing involves sharing when there is only one of something or sharing something that belongs to you.
Non-costly sharing involves giving someone something there are lots of, and that isn’t special to you.
If you want to encourage your toddler to share, having lots of similar things and not asking them to share special belongings can help.
But, if your toddler seems to be getting the hang of sharing, costly sharing (so sharing their own things or when there aren’t many of the item) seems to increase happiness for toddlers – but not for pre-schoolers.[1]
This might be because as your toddler begins to really understand the idea of ownership, they become more reluctant to share the things that belong to them.
One more finding from research that might be helpful – is that young children were more likely to feel happier after sharing if they had chosen to do this themselves than if they were told to do it.[2]
So, rather than telling them to share, why not use some of these ideas to help them?
References:
[1] Song, Y., Broekhuizen, M.L., & Dubas, J.S. (2020). Happy little benefactor: Prosocial behaviors promote happiness in young children from two cultures. Frontiers in Psychology, 11, Article 1398.
[2] Wu, Z., Zhang, Z., Guo, R., and Gros-Louis, J. (2017). Motivation counts: autonomous but not obligated sharing promotes happiness in preschoolers. Frontiers in Psychology. 8, Article 867.