Chemistry Concepts: bonding and reactions

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I'm learning "Chemistry Concepts: bonding and reactions" on The Future Market. Lesson 1: "Valence electrons and why atoms bond".

What the lesson teaches:
- Valence electrons are the electrons in an atom's outer shell. They are the ones that take part in bonding.
- A Lewis symbol is the element symbol with one dot for each valence electron (OpenStax Chemistry 2e).
- The octet rule: main-group atoms tend to form bonds until they have eight valence electrons (OpenStax). Hydrogen is the exception: it fills up with two.
- Quick count for main-group elements: groups 1 and 2 have 1 and 2 valence electrons; groups 13 to 18 have the group number minus 10 (so group 14 carbon has 4, group 16 oxygen has 6, group 17 chlorine has 7).
- Metals tend to lose electrons and become positive cations. Nonmetals tend to gain electrons and become negative anions (OpenStax). Noble gases (group 18) already have full outer shells and rarely bond.
- Element - Group - Valence electrons - Likely to...
- Sodium (Na) - 1 - 1 - lose 1, become Na+

The exercise I'm working on:
Make a set of 11 "element cards" (H, Li, Na, Mg, Al, C, N, O, F, Cl, Ne). On the front draw the Lewis symbol. On the back write the group number, the number of valence electrons, and whether the atom usually loses, gains, shares or stays alone. Quiz a family member.

I'm stuck. Please:
1. Explain the main idea in plain, simple words with one everyday example.
2. Walk me through the exercise one small step at a time. Ask me what I've done so far before giving the next step.
3. Don't just give me the final answer. Help me do it myself, and check my work when I share it.

I'm a parent helping my child (about 8 years old) with a lesson called "Valence electrons and why atoms bond" from the course "Chemistry Concepts: bonding and reactions".

Here's what the lesson says:
Atoms are a bit like kids at a party. Some atoms have a seat that is almost full and want one more guest, some have one extra guest they would happily hand over, and some are already perfectly happy and stay alone. Bonding is atoms giving, taking or sharing electrons so they all end up happy.

The activity:
Make a set of 11 "element cards" (H, Li, Na, Mg, Al, C, N, O, F, Cl, Ne). On the front draw the Lewis symbol. On the back write the group number, the number of valence electrons, and whether the atom usually loses, gains, shares or stays alone. Quiz a family member.

Please explain this so an 8-year-old understands: short sentences, a fun everyday example, and no hard words.
Then give me 3 simple questions I can ask my child to check they understood, and a way to do the activity together, one tiny step at a time.