1. 5 SIMPLE INVENTIONS ( INFRARED LEVEL ... )

    5 SIMPLE INVENTIONS ( INFRARED LEVEL ... )

    16
    11
    105
  2. 3 SIMPLE INVENTIONS ( ETCH MACHINES ... )

    3 SIMPLE INVENTIONS ( ETCH MACHINES ... )

    24
    15
    87
  3. 3 SIMPLE INVENTIONS ( MINIATURE POLISHER ...)

    3 SIMPLE INVENTIONS ( MINIATURE POLISHER ...)

    16
    6
    31
  4. 3 SIMPLE INVENTIONS ( MICRO CLEANER ...)

    3 SIMPLE INVENTIONS ( MICRO CLEANER ...)

    19
    9
    71
  5. 4 SIMPLE INVENTIONS ( ELECTRONIC BOOKMARK ...)

    4 SIMPLE INVENTIONS ( ELECTRONIC BOOKMARK ...)

    15
    7
    42
  6. 3 SIMPLE INVENTIONS ( ELECTRIC TOOTHBRUSH ...)

    3 SIMPLE INVENTIONS ( ELECTRIC TOOTHBRUSH ...)

    15
    7
    33
  7. 3 SIMPLE INVENTIONS ( VIBRATION SHOVEL ...)

    3 SIMPLE INVENTIONS ( VIBRATION SHOVEL ...)

    9
    4
    48
  8. 3 SIMPLE INVENTIONS ( MATCHES LIGHTER ...)

    3 SIMPLE INVENTIONS ( MATCHES LIGHTER ...)

    8
    2
    20
  9. 3 SIMPLE INVENTIONS ( COIN CLASSIFICATION MACHINE ...)

    3 SIMPLE INVENTIONS ( COIN CLASSIFICATION MACHINE ...)

    29
    10
    47
  10. 3 SIMPLE INVENTIONS ( ELECTRIC BRUSH GLUE ... )

    3 SIMPLE INVENTIONS ( ELECTRIC BRUSH GLUE ... )

    24
    7
    40
  11. 3 SIMPLE INVENTIONS ( MINIATURE VACUUM CLEANER ...)

    3 SIMPLE INVENTIONS ( MINIATURE VACUUM CLEANER ...)

    16
    6
    78
  12. 4 SIMPLE INVENTIONS (ELECTRIC PENCIL SHARPENER ...)

    4 SIMPLE INVENTIONS (ELECTRIC PENCIL SHARPENER ...)

    4
    1
    37
  13. 3 SIMPLE INVENTIONS ( ANTI THEFT ALARM ... )

    3 SIMPLE INVENTIONS ( ANTI THEFT ALARM ... )

    12
    5
    31
  14. 5 SIMPLE INVENTIONS ( AUTOMATIC FEEDING MACHINE ...)

    5 SIMPLE INVENTIONS ( AUTOMATIC FEEDING MACHINE ...)

    23
    10
    43
  15. 2 SIMPLE INVENTIONS ( ELECTRIC REAMING SHEAR ... )

    2 SIMPLE INVENTIONS ( ELECTRIC REAMING SHEAR ... )

    5
    1
    16
  16. 17 Simple inventions and DIY ideas!

    17 Simple inventions and DIY ideas!

    12
  17. 6 SIMPLE INVENTIONS Using Recycled Materials

    6 SIMPLE INVENTIONS Using Recycled Materials

    5
  18. 6 SIMPLE INVENTIONS Using Recycled Materials

    6 SIMPLE INVENTIONS Using Recycled Materials

    1
  19. 2 SIMPLE INVENTIONS ( CUP BLENDER MACHINE ...)

    2 SIMPLE INVENTIONS ( CUP BLENDER MACHINE ...)

    4
    1
    12
  20. 6 SIMPLE INVENTIONS Using Recycled Materials

    6 SIMPLE INVENTIONS Using Recycled Materials

    17