Saya memasukkan uang receh ke dalam celengan kecil.

Because masuk means to enter / to go in, while memasukkan means to put something into something.

• masuk = intransitive
  
  • Saya masuk. = I go in / I enter.
• memasukkan = transitive
  
  • Saya memasukkan uang receh... = I put the coins in...

So in this sentence, the subject is not entering anything; the subject is causing the money to go inside the piggy bank.

It comes from the root masuk plus affixes:

• masuk = enter, go in
• meN- ... -kan → memasukkan

This pattern often gives the meaning to cause something to go somewhere or to put something into something.

So:

• masuk = go in
• memasukkan = put in / insert

This is a very common Indonesian pattern, and it is worth recognizing when you learn new verbs.

Uang receh means small change, especially coins or low-value money.

• uang = money
• receh = small change, loose change, trivial small-value money

In natural English, this sentence would often be translated as coins or loose change, even though Indonesian literally says something closer to small-change money.

A related word you may also hear is recehan, which also means loose change.

Because in Indonesian, descriptive words usually come after the noun.

So:

• uang receh = change money / loose change
• celengan kecil = small piggy bank

This noun + modifier order is very common in Indonesian.

Compare:

• rumah besar = big house
• mobil baru = new car
• buku bagus = good book

So uang receh follows a normal Indonesian word order pattern.

Ke dalam means into / to the inside of.

• ke = to, toward
• dalam = inside

Together, ke dalam emphasizes movement into the inside of something.

So:

• ke celengan kecil = to the small piggy bank
• ke dalam celengan kecil = into the small piggy bank

In this sentence, ke dalam is used because the action is specifically about putting something inside the piggy bank, not just moving it toward the piggy bank.

Celengan means piggy bank or money bank/container for saving coins.

Even though English says piggy bank, Indonesian celengan does not have to be pig-shaped. It can be any small container used for saving money.

So in this sentence, celengan kecil simply means a small piggy bank / a small money bank.

Because adjectives usually come after the noun in Indonesian.

So:

• celengan kecil = small piggy bank
• rumah kecil = small house
• anak kecil = small child / little child

This is one of the most basic and important word-order differences from English.

English: small piggy bank
Indonesian: celengan kecil

It sounds natural and correct.

It is a normal way to say that someone put some loose change into a piggy bank. The sentence is clear, grammatical, and neutral in tone.

A native speaker might also say similar things like:

• Saya memasukkan recehan ke dalam celengan kecil.
• Saya menaruh uang receh di dalam celengan kecil.

But your sentence is perfectly natural.

Both can work, but they focus on slightly different things.

• memasukkan = put in / insert into
  • emphasizes moving something inside
• menaruh = put / place
  • more general

So:

• Saya memasukkan uang receh ke dalam celengan kecil.
  = I put the coins into the small piggy bank.
• Saya menaruh uang receh di dalam celengan kecil.
  = I put/placed the coins in the small piggy bank.

With celengan, memasukkan is especially natural because the idea is that the money goes into it.

Indonesian nouns usually do not change form for singular vs. plural.

So uang receh could mean:

• some loose change
• coins
• small-value money

The exact number is understood from context, not from the noun form itself.

In this sentence, most learners would naturally understand it as some coins / some loose change, not one single coin.

Yes, in some contexts it could be omitted, especially in casual speech, if it is already clear who is doing the action.

For example:

• Memasukkan uang receh ke dalam celengan kecil.

This might be understood from context as (I’m) putting loose change into the small piggy bank.

However, including saya makes the sentence complete and clear, especially for learners and in neutral standard Indonesian.

It is neutral and completely acceptable in standard Indonesian.

• saya is polite/neutral for I
• memasukkan is standard
• uang receh, ke dalam, and celengan kecil are all normal vocabulary

In very casual conversation, someone might choose a less formal pronoun such as aku, but your sentence itself is not overly formal.

Compare:

• Saya memasukkan uang receh ke dalam celengan kecil. = neutral / polite
• Aku memasukkan uang receh ke dalam celengan kecil. = casual, friendly

It is pronounced roughly like reh-cheh.

A simple approximation for English speakers is:

• re as in red but shorter
• ceh with c pronounced like ch

So receh sounds approximately like reh-cheh.

The c in Indonesian is normally pronounced ch, as in:

• cari = cha-ri
• celengan = che-leng-an
• receh = reh-cheh