Ethan's Bicycle represent

Ethan’s bicycle is symbolic of the relationship Jin and Mae want to have with Ethan, and of Kyung's inability to provide for his family. Jin and Mae leave the gift at the house, and Kyung and Gillian do not give it to Ethan because it is a much larger gift than they are able to give him. When Jin comes to stay with them, he and Ethan assemble the gift, and that is again symbolic of the relationship Jin wants to have with his only grandson.