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| A giant human sewing machine | Tim bolts on a tensioning crank | |
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| Sewing machine bits power these 2 museum models | Maggie Snell is potty,about sewing machines | Rex uses sewing machine belts as caterpillar tracks |
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| Tim wrestles with a rapidly expanding gas | An ice making plant releases another batch | |
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| Rex and Tim's home made evapourator | Dry ice means CFCs are used instead of CO2 | Rex built an air rifle from an old fridge compressor |
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| Tim shows how well insulated fridges are |
