Last year must have been a banner year for garden spiders. This past month, we've seen many little clusters of newly hatched babies. The babies are tiny, pin head size. The top photo below is next to a standard size household rain gutter, for size comparison.
The babies tend to stay in a tight ball, all on thin webs clustered together. If the web is disturbed, by wind or physically touching part of it, the spiders scatter in a tiny little cascade, dispersing any target. If the disturbance does not continue, they all pull back into the cluster in a few minutes.
I think these are cross-orb weavers (