Creative toolkits are collections of what are essentially physical toys for the design team to play with, find inspiration from, and be happy.
Creative Toolkits is Day 21 of 100 Days of UX, an exploratory effort to survey the 100 methods of design outlined in Martin and Hannington's Universal Methods of Design. For 100 consecutive days, I learn one new method a day and write about it.
Creative toolkits, which are typically used when generating ideas, are to create an environment for divergent thinking as the designers put together, pull apart, and manipulate the toys. The physicality of the toys also provides an avenue for exercising kinesthetic thinking and discussion about potential solutions.