The garden looks to showcase the benefits of the natural world and what it can bring to physical and mental well-being.
Kensington Palace said the woodland wilderness garden - designed alongside landscape architects Adam White and Andree Davies, and the Royal Horticultural Society (RHS) - will "inspire families to get outside and explore nature together".
In a statement, it added: "The garden hopes to trigger memories of time spent in nature, and encourage others to go out and create new experiences in the great outdoors."
The centrepiece of the garden will be a high-platform birds nest-inspired tree house, which will be clad in stag horn oak.
The garden will also have a swing seat, a campfire, a rustic den, tree stumps, stepping stones and a hollow log for children to play on.
The display will feature "incredible edibles" too, along with plants for craft activities, "forest scents" and plants, shrubs and trees of different textures and heights.
Children will be able to paddle and play in a waterfall and stream in the garden co-created by Kate, whose involvement with this year's RHS garden was first revealed last month.
The royal is following in the footsteps of her father-in-law the Prince of Wales, who is known to have a passion for horticulture.