For an engineering intern, you're not being very creative.
Here's what you do: brainstorm 30 solutions to your problem, don't judge anything, just generate lots of ideas.
Estasblish your selection criteria (cost, ease of use, available materials, etc).
Match your ideas to your criteria.
Combine ideas to get the best possible solution.
Identify objections to your solution.
Generate 20 more ideas.
combine the new ideas with the solution from above to eliminate objections.
repeat until you have something you can live with.

Do this through our your engineering career and find success.