Think about what skill you are trying to accomplish? In New Jersey, we work off of the NJ Technology Standards (2014) 8.1 and 8.2. ( http://www.state.nj.us/education/cccs/2014/tech/8.pdf )
Now that you have this ready, and you have pulled what you need, it's time to ask the classroom teachers what the their theme is in various subjects. Once you have this, you can start to connect the dots with the Common Core Standards (http://www.corestandards.org/) and the NexGen Science Standards.
(https://www.nextgenscience.org/dci-arrangement/k-2-ets1-engineering-design) (https://www.nextgenscience.org/topic-arrangement/3-5engineering-design)
Now that you have a connected project, plan out your time. You'll need to make sure you have everything you need to be successful, Robots and IPADS would need to be checked for updates. Inventory your circuit boards to ensure you have everything you need for a small group.
When implementing the lesson in a K-3 level, you'll need to demonstrate the activity for the lower levels. This gives them an idea of how to move forward, because they are early emergent readers K-1 may not be cognitively ready (based upon my early childhood development research) to handle higher-cognitive thinking until they have had ample practice with basic skills.
Don't forget to just have fun with this too! My favorite part of lesson planning is connecting how to use the technology skill to further an educational concept.