Hi, sounds like you've a few things going on xx
With you already having identified it as a stressful environment, that makes it good for risk assessment, can you look at why it's stressful and see if the risks can be minimised/mitigated.
Are your children crawling, walking, running, are there any individual needs that require 1 to 1 support. Is the flooring unsuitable for your age group - loose gravel, bumpy uneven ground? Are you able to request a colleague help with safety supervision duties so you're able to engage more freely in an activity with the children?
How about a low
wall inflatable paddling pool - no water, with some
balls - small and
larger, pram blankets,
nets and books inside and then some buckets lined up around the outside edge. Great for transporting things, dumping, emptying, throwing, aim & catch ..
What toys that are usually indoors can be taken outside?
On another note, is the potential you've seen for the oudoor space something you can make suggestions for in a staff meeting?
Hth xx