Perhaps a yellow variety of Fly Agaric, Amanita muscaria.
Same pair as above, two days later. The older of the pair has a diameter of 5.25", and height of 5.5".
Larger of pair: 4.5" diameter, 2.25" tall
2.75" diameter; 2.75" tall
3.25" diameter; 4.5" tall
1.75" diameter; 3.25 inches tall--but immature
A funnel cap. 5" diameter: 3" tall
A coral. ~6" across; 3" high
A big puffball. 7" across; 5" high
1" diameter, 3" tall