Prickly Tickly! This is a great idea for fun, sensory play - using materials foraged from outdoors to connect children with the wonder and variety of nature.
Choose some objects from outside, that could be either described as prickly or tickly.
Blindfold one child, seated. Another child (or you) can pass the objects one at a time for them to explore with their hands and describe as either prickly, or tickly!
Older children might be able to guess what each object is.
Simple play is often the best, and this is easy peasy.