From RWP Wiki
The house can be found near the summit of the tree in all seasons of Click Clock Wood.
There is one main room, and two offset rooms.
This contains a bed, a table, shelves, a wardrobe and an acorn-shaped lamp. During various seasons, the owner of the house, Nabnut, can be found here. In Spring, he will be eating a large pile of acorns. In Summer, he can be found on the floor; the Acorns are gone, and he has gained weight. In Autumn, he stands outside and complains about having eaten all his acorns, as he will have none left for the coming winter. He asks Banjo and Kazooie to collect more acorns for them; doing so will earn them a Jiggy. Afterwards, Nabnut will be celebrating inside his house in front of a sizable pile of acorns. Finally, in Winter, he can be found asleep in bed with Mrs. Nabnut next to him.
Offset Room (right)
There is a pool of water here, and a collectible Acorn at the bottom.
Offset Room (above)
Stop 'n' Swop
The Yellow Secret Egg appears in Nabnut's house during the winter. In the Nintendo 64 version of Banjo-Kazooie, it will only appear once the cheat "CHEAT NOW BANJO WILL BE ABLE TO SEE IT ON NABNUTS TABLE" is entered in Treasure Trove Cove's sandcastle. In the Xbox Live Arcade version, the Yellow Secret Egg will appear once a Banjo-Kazooie: Nuts & Bolts save file is located on the hard drive.