By the time a puppy is 7 weeks old, it should have:
1) BEEN ON 7 different surfaces:
 

• Carpet
• Concrete
• Wood
• Vinyl
• Grass
• Dirt
• Gravel
• Wood Chips 
• Newspaper Etc.

2) PLAYED WITH 7 different types of objects:
 

• Big Balls
• Small Balls
• Soft Fabric Toys
• Fuzzy Balls
• Squeaky Toys
• Metal Items
• Wooden Items
• Paper/Cardboard Items
• Milk/Soda Jugs Etc.

3) BEEN IN 7 different locations:
 

• Front Yard
• Back Yard
• Basement
• Kitchen
• Car
• Garage
• Laundry Room
• Bathroom
• Crate
• Kennel Etc.

4) BEEN EXPOSED to 7 challenges:
 

• Climbed a box
• Climbed off a box
• Go thru a tunnel
• Climbed up steps
• Climbed down steps
• Climbed over obstacles
• Played hide & seek
• Go in & out doorway with a step Etc.

5) EATEN FROM 7 different containers:
 

• Metal
• Plastic
• Cardboard
• Paper
• China
• Pie Plate
• Frying pan Etc.

6) EATEN IN 7 different locations:
 

• Crate
• Yard
• Kitchen
• Basement
• Laundry room
• Bathroom
• X-pen Etc.

7) MET AND PLAYED WITH 7 new people:
 

• including children & the elderly