Today, Track and Field inspired me to think of a new idea. This idea allows one to make a multi-purpose shoe. This shoes comes with retractable spikes, for athletes to use when they train. The athlete can then retract the spikes after training, and as such he need not carry two different shoes with him.
Also, this idea is possible with rollers. This shoe will come with wheels for a child to wheel on. However, these wheels can be retracted to allow the shoe to be multi-purpose.
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