Min søn vil også lave en tegning med en rød farveblyant.

Because søn is a common-gender noun. In Danish:

• min is used with common-gender nouns
• mit is used with neuter nouns

So you say:

• min søn
• but mit barn

A good habit is to learn Danish nouns together with en or et.

After a possessive such as min, din, hans, vores, and so on, the noun is normally in the indefinite form in Danish.

So Danish says:

• min søn
• min bil
• mit hus

not:

• min sønnen
• min bilen
• mit huset

The possessive already makes the noun specific, so Danish does not add the definite ending as well.

Vil is the present tense of ville, and here it works as a modal verb.

In Danish, modal verbs are followed by an infinitive without at:

• vil lave
• kan lave
• skal lave

not:

• vil at lave

So the important grammar point is that lave is a bare infinitive after vil.

Because this is normal Danish main-clause word order.

In Danish main clauses, the finite verb usually comes in second position. So here you get:

• Min søn = subject
• vil = finite verb
• også = adverb

That is why også comes after vil.

This is the same general pattern you see with other adverbs too:

• Han kommer ikke i dag
• Vi skal nok hjælpe

Yes. Both are possible.

• tegne = to draw
• lave en tegning = literally make a drawing

The difference is mostly one of nuance:

• tegne focuses more on the action
• lave en tegning focuses a bit more on producing a drawing as a result

In everyday Danish, either can work in a sentence like this.

Because tegning is a common-gender noun, so its article is en.

You have to learn Danish nouns with their gender:

• en tegning
• en bog
• et hus
• et barn

So here en is simply the correct indefinite article for tegning.

Because farveblyant is a singular countable noun, and singular countable nouns in Danish normally need some kind of determiner.

Here it is indefinite, so you use en:

• med en rød farveblyant

If it were definite, you could say:

• med den røde farveblyant

Because Danish normally writes compound nouns as one word.

Farveblyant is made up of:

• farve = colour
• blyant = pencil

So literally it is colour-pencil.

This is extremely common in Danish. English often uses two words where Danish uses one compound.

It means a red coloured pencil: a colouring pencil whose colour is red.

So:

• farveblyant = coloured pencil / colouring pencil
• rød farveblyant = red coloured pencil

The adjective rød tells you the colour of the pencil.

Because adjective endings in Danish depend on gender, number, and definiteness.

Here the noun phrase is:

• singular
• common gender
• indefinite

So the adjective has its basic form:

• en rød farveblyant

Compare:

• et rødt hus = neuter singular indefinite
• den røde farveblyant = definite
• røde farveblyanter = plural

So rød is the correct form for this exact noun phrase.

Here med introduces the instrument used for the action.

So med en rød farveblyant means:

• with a red coloured pencil
• using a red coloured pencil

This is very similar to English with in sentences like:

• write with a pencil
• cut with scissors

Yes. It follows a very typical Danish pattern:

Subject + finite verb + adverb + infinitive + object + prepositional phrase

In this sentence:

• Min søn = subject
• vil = finite verb
• også = adverb
• lave = infinitive
• en tegning = object
• med en rød farveblyant = prepositional phrase

So structurally, it is a very standard Danish sentence.

Sometimes yes, but the emphasis may change.

The original sentence:

• Min søn vil også lave en tegning

is the most neutral version.

If you move også, you may highlight something different. For example:

• Også min søn vil lave en tegning = my son too will make a drawing

So the position of også matters, and the original placement is the most natural default here.

There is no perfect English equivalent, but a useful approximation is this:

• start with a vowel somewhat like the one in British bird
• then round your lips more

A couple of extra notes:

• søn has a clear final n
• rød has a very soft final d in standard Danish, not a strong English-style d

If you know other languages, the vowel may remind you a bit of French deux or German schön.