These tiny fungi belong to a group known as bird’s nest fungi. I think these are Nidula emodensis. They grow on rotting twigs, dung or humus and look like very tiny nests with eggs. The small cup-shaped structures are about 5mm across. Young specimens have a lid-like covering and when that falls off, the ‘eggs’ or packages of spores called peridioles are exposed. They are released when raindrops fall into the cups and splash out the brown packages.