One of the biggest struggles we have in providing art classes to younger children is their endurance, their ability to fully participate for the duration of the class.
Endurance: the ability to sustain a prolonged stressful effort or activity
Merriam-Webster.com. 2017. https://www.merriam-webster.com (11 January 2017).
We teach regular art classes in a preschool after school enrichment program as well as our weekend and after school classes. For children ages 3-5, we know that they will not be able to sit nicely in a chair for 45 minutes while we ramble on about a particular artist, show examples of famous artwork, and then proceed to teach them various techniques, and still expect a carefully designed product at the end of class. No, we expect that their endurance for these difficult tasks will be no more than 5-10 minutes at a time. Besides, for many young children, coloring and attention to task are two very difficult activities in and of themselves, let alone completing a recognizable art project.
To accommodate and make it fun for everyone, work in natural breaks, provide related sensory activities, and rotate between sitting activities and those where they can get up and choose supplies, or stand at the table or vertical surface. Instead of one beautiful masterpiece, we choose 2-3 smaller projects that are modified to be less involved and provide novelty and interest for them to be engaged the whole time, building their endurance for longer activities which then carries over into the home and school settings.